Groupon, Tesla lead the charge: Investors cheered strong earnings from Groupon and Tesla.

Groupon(GRPN) surged after the daily deals site posted strong sales and announced a $300 million share-buyback program. The rally bumped Groupon's market valuation to $7 billion, well above the benchmark $6 billion figure that Google(GOOG) reportedly offered for the company in 2011.

But Solar City(SCTY), which is chaired by Tesla CEO Elon Musk, reported a wider loss than analysts had expected. The stock tumbled on the news. But one trader still expressed support for all things Elon Musk.

rayinla: $SCTY testing 50dsma and still holding, while $TSLA trending slowly. Will there ever be a space-X IPO? Bullish

T-Mobile(TMUS) topped revenue forecasts and said it had a net addition of 1.1 million customers during the quarter. Apollo Global Management(APO) swung to a quarterly profit and

Priceline.com(PCLN) rose in after-hours trading after the company released earnings that beat expectations. The stock is set to move even closer to $1,000. Shares were trading around $970 after the closing bell. And shares of Priceline competitor Orbitz(OWW) soared more than 35% after it reported solid earnings.